The rear band doesn't take much stress in normal use. It only grabs for reverse and to give engine braking in manual 1st. Lots of downshifting to manual 1st where the vehicle has to rev up the engine wears the rear band as does abusive shifting into reverse, which tends to piss off the roller clutch too. Backing out the driveway in reverse then shifting into drive while still rolling backwards will really tear up the roller clutch.
Meanwhile, the front band is literally second gear. It wears any time a shift is made in or out of second gear.
'72 Jeep Wagoneer Custom, 360 V8
I love how arguements end as soon as Ristow comments. Ristow is right...again.